Thermostatic self-closing gas-burner.



Rm, o. 9 I 6, E N U J ,D E nl. N E m1 A P .u T E TU 0. a

THERMOSTATIG'SBLP CLOSING GAS BURNER.

APPLICATION FILED 00T. 29, 1904.

' 4 SHEETS-SHEET 1.

d .have Lzz'zz 07",

110.791,698. i PATBNTED mms-,1905.

` G. o. JETT. 1

ILHERMOSTATI() SELF CLOSING GAS BURNER. ARPLIUATION FILED 00T. 29,1904.

4SHBETS-SHEHT z.

No. '791,698'. f yPLTLII'IED JUNI: 6, 1905. G. o. JLTT.

THLRMOSTATIGV SELL 'CLOSING GAS BURNER.

APPLICATION FILED ooT. 29,1904. v

' 4 SHEETS-MEET s.

@www i v No. 791.658.- l. y PATENTEDJUNE 6. 1905.

' G.. 0. JBTT. l

THBRMOSTATIG SELF GLosING GAS BURNER.

' PPI'AITION FILED 0UT;29,1904.

" 4 SHEETS-SHEET 4.

UNITED STATES` Patented June 6, 1905.

GEORGE O. JETT, OF BUFFALO, NEW YORK.

TH'ERMQSTATIC SELF-CLOSING GAS-BURNER.

SPECIFICATION forming part of LettersPatent No. 791,698, dated J une 6, 1905. l Awami@ fuea otobera 1904. sesamo. 230,593.

To @ZZ whom/ t may concern:

Be it known that I, GEORGE C. J ETT, a citizen of the United States, residing at Buffalo,

in the county of Erie and State of New York, have invented certain new and useful Improvements in Thermostatic Self-Closing Gas- Burners, of which the following is a specification.

My invention relates to thermostati'c selfclosing gas-burners; and it has for its object the production of a burner of this character which is positive in action, simple in construction, and which is so constructed that.

every part thereof is rendered accessible for cleaning, repairing, and adjusting, thus assuring perfect operation with the least attention. l Another objectJ is to provide a thermostatic controller which is very sensitive and quickly responds to the change of temperature due to the light being accidentally extinguished or to the increased heat of the burner-flame.

WVith these and other objects in view the invention consists in the construction of the thermostatic controller and in the construction, arrangement, and combination of the various parts, as will be hereinafter described, and particularly pointed out in the subjoined claims.

In the drawings, Figure 1 is a side elevation of a burner constructed according to my invention. Fig. 2 is an enlarged central vertical section of the same with the lower end of the gas-cock in elevation. Fig. 3 is a similar section on a plane at a `right angle to that shown in Fig. 2. Fig. 4is a horizontal section taken on line 4 4, Fig. 2. Fig. 5 is a horizontal section taken on line 5 5, Fig. 2. Fig. 6 is a horizontal section taken on line 6 6, Fig. 2, looking up. Fig. 7 is a sectional view through the coil of the thermostatic controller, taken on line 7 7,Fig. 2,1ooking to the right. Fig.`

8 is a further enlarged detached perspective view of the auxiliary valve whereby the How of gas is shut olf through the eti'orts of the thermostaticv controller when the gas is acci? dentally extinguished. Fig.` 9 is a further enlarged detached perspective view of the manually-actuated lever whereby the auxiliary Valve is opened. Fig. 10 is a central vertical section of the lower end of the burner, show-' ing the 'position of the various parts after the thermostatic controller has come into-full action. Fig. 11 is a sectional elevation of the main gas-cock, with its attached cam for actuating the lever, whereby the auxiliary valve is opened. Fig. 12 is a sectional perspective view of the lower part of the gas-cock, taken on line 12 12, Fig. 10, the lever for opening the auxiliary valve being omitted. Fig. 13

is a vertical section of a regulating device, showing my invention in modified form. Fig. 14 .is a vertical section taken at a right angle to Fig. 13. Fig;.15 is a horizontal section taken on line 15 15, Fig. 13. Referring t0 the drawings in detail, corresponding numerals of reference referto correspondingparts in the several figures.

The reference-numeral 16 designates a gascock having the usual'inlet-passage 17, intersected by a tapering valve or plug 18, pro

ireceive an internally-threaded collar 23, having an inwardly-extending annular flange 24. Between said Harige and they upper end of the valve-casing I clamp the peripheral flange 25 of a valve-housing 26, the latter being cast with a transverse wall 27, which divides the housing into anupWardly-opening chamber 28 and 'a :downwardly-opening chamber 29. Formed in the transverse wall 27 of said'valvehousing is a curved valve-seat 30, extending partly through the wall and communicating with the upwardly-opening chamber 28 by a restricted gas-passage 31.

32 designates an auxiliary valve of cylin-v drical form in cross-section and having a semispherical closure end 33, adapted to be seated against the correspondinglyshapedl valve-seat `30, thus assuring perfect closure roo l gitudinal groove 34 and with a transverse pin in said groove. The auxiliary valve is also provided with a valve-stem 36, which extends from the closure end thereof through the gas-passage 31 and into the upwardlyopening chamber 28 of the valve-housing.

As this invention is particularly adapted for incandescent gas-burners, I have illustrated the same in preferred form on burners of this type, in which a tube 37 is slipped over the auxiliary-valve housing 26 and has its upper end provided with the usual wiregauze diffuser. The lower end of said tube is provided with air-apertures 38, through which air passes to mingle with the gas passing through said tube. An air-regulator 39, Fig. 1, of the usual form surrounds the bottom of said tube, and by means of the same the apertures 38 may be partly closed to provide the proper amount of air to the gas. The usual stamped chimney-support 40 is provided for holding the chimney 41. A mantle 42 is suspended over the tube 37 by means of a support 43.

Within the tube 37, but in the heat Zone, I confine the thermostatic controller 44, which consists of a double coil 45, formed of two strips of unequally-expansible metals, as copper and untempered steel, brazed together and located directly beneath the wire-gauze diffuser. The double coil is arranged with one coil within the other, one end of the inner coil being directed outwardly, as at 46, and riveted to the tube 37, and the opposite end oi' the inner coil is continued in a larger surrounding coil, which terminates in a depending arm 47, extending inte the upwardly-opening chamber of the auxiliary-valve housing 26, said depending arm being pivotally connected to the stern of the auxiliary valve. Throughout the coiled portion of the thermostatic controller two strips of metal are used, the outer strip being copper and extended to form the terminals of the controller.

Formed on the auxiliary-valve housing is a depending lug 48, to which one end of a link 49 is pivotally secured. The other end ofsaid link has pivotal connection with a lever 50, having vertical end portions 51 and an intermediate horizontal portion 52, the latter serving to offset the end portions. The upper end of said lever enters the grooves 34 in the auxiliary valve and is beveled, as at 53, toward the closure end of said valve. Said lever is also provided on that edge thereof nearer the free end of the valve with a curved notch 54, forming a lock edge for engagement with the pin 35 in the groove 34 of said valve.

The upper end of the main valve is reduced in diameter to form a shoulder 55, said reduced portion 'having a straight side 56. A cani 57, having an aperture corresponding to the form of the reduced upper end of the valve, is seated against said shoulder 55 and is thus held against turning independent of said valve. A securing-screw 56" enters a threaded central bore in the upper end of the main valve and is provided with an enlarged head having its marginal portion bearing against said cam, thus preventing disconnection of the latter f rom the valve. Said cam is notched, as at 57, to form two acting shoulders 5S 59, arranged ninety degrees from each other. The lower end of the lever 50 lies normally within the notched portion of the cam, so as to be actuated by the stops on said cani as it is turned.

Within the casing of the valve is a fiat spring 60, having one end secured with a screw 61 entering the metal of the casing, from which point the spring gradually rises and at its free end is inclined downward, as at 62. The position of the spring with relation to the cam is such that when the gas is turned olf the free end of the spring lies beneath the notched portion of the cam and bears with said end against the lower end of the lever 50, tending to hold said lever in its normal position, also serving to elevate said lever and force the upper end of the saine in rear of the pin 35 in the auxiliary valve when the main valve is being turned oli.

The stem 36 of the auxiliary valve has its outer end gradually enlarged, and when the said valve approaches the end of its outward movement said gradually-enlarged portion oi' the stern enters the gas-passage 31 and closes the lattei` in proportion to the extent the valve is opened beyond a certain point.

The operation of the device is as follows: To light the gas, the niain valve 18 is turned to the right a quarter of a revolution, which action turns the cam 57, causing the stop 58 thereon to engage the lower end of the lever 50, and thus actuate the same to unseat the auxiliary valve 32, which in turn places the coil of the thermostatic controller under tension. In this condition the upper end of the lever 50 is held in rear of the pin 35 in the auxiliary valve, and the stop 58 bears against the lower end of said lever, thus holding the same against lowering by force of gravitation. In this position of the parts the gas has a free passage from the feed-pipe to the burner. Therefore when the gas is lirst ignited the coil of the thermostatic controller is left under tension, and as said coil becomes heated by the action of the burning gas it tends to curl up, thus taking the strain olf the depending arm 47 and carrying the same inward to a greater extent, which carries the auxiliary valve still farther from its seat and allows the lever 50 to gravitate below the grasp of the pin 35, as shown in Fig. 10. It

will be noticed in this ligure that the outer end of the link 49 is carried with the lever 5() and that the lower end of thc latter has swung IOO away from the stop 58 on the cam. lWhen the parts assume this position, the auxiliary valve is free to move by action of the thermostatic controller only. If by reason of increased pressure in the gas-main the iiow of gas should be above normal, the temperature would immediately rise, which would cause the enlarged portion of the valve-stem to enter the gas-passage, thus making the area of the same smaller and raising the resistance at that point to momentarily check the undue flow of gas. When the temperature falls, the reverse action will take place, thereby giving a constant quantity of gas even with a variable pressure. By this means a perfect gas-regulating device is obtained, whereby the flow of gas will be constant at all times. If for any reason, accidental or otherwise, the light should become extinguished, the temperature within the heat zone containing the coil of the thermostatic controller would immediately fall, which would cause the coil to reverse itsv compensating motion, and consequently draw on the valve-stem of the auxiliary valve to close the latter, thus entirely cutting off the escape of gas and providing against loss of life from asphyxia and also preventing waste of gas. On discovering the gas extinguished and the main valve open a quarter-turn of the latter to the left will bring the stop 59 of the cam against the lower endl of the lever 50, forcing the said end in contact with the free inclined end of the spring 60, whereby said lever is elevated while being swung to its normal position, during which action the inclined upper end of said lever strikes the pin in the auxiliary valve, thereby slightly elevating said valve while the lower end of said lever depresses the spring .60 until the said lever clears the said pin and assumes its normal position with its upper end betweensaid pin and the closure end of said valve, said lever being held elevated by the spring 60. In this the normal position the stop 59 of thecam is held against the lower end of the lever 50.

In the modification shown in Figs. 13 to 15 the auxiliary-valve housing is provided with an upwardly projecting arm 63, having a socket 64 at its upper end for the reception of one terminal of the thermostatic controller, which is held therein by a set-screw 65. In this instance the drawings show the invention adapted more particularly for stove connection, and in lieu of the collar 23 and tube 37, previously described, I screw a pipe-section 66 onto the upper end of the valve-casing, said pipe-section having an internal .shoulder 67, which bears against the peripheral flange 25 of the valve-housing, thereby locking the same securely in place.

controller differs from that described hereinbefore in that the fixed terminal is directed downward and held in thesocket 64, formed at the upper end of the upwardly-projecting arm 63. In this instance I have shown theVy The thermostaticthe latter, and a thermostatic controller comprising two spiral coils arranged one within the other and formed of two strips of unequallyexpansible metals, one terminal of said con-` troller being secured to a fixed point and the other terminal thereof having connection with the auxiliary valve.

, 2. The combination with the gas-burner and a valve therefor, of an auxiliary valve between the point of consumption of the gas and the jrst-mentioned valve and being connected with the latter, a thermostatic controller comprising two spiral coils arranged one within the other and formed of an outer strip of metal and an inner strip of metal', each of different expanding capacity, one of said terminals being secured to a h'xed point and the other terminal having connection with the auxiliaryy valve.

l 3. The combination with the gas-burner and a valve therefor, of an auxiliary valve between the point of consumption of the gas and the first-mentioned valve, operative connection between said auxiliary valve and the rst-mentioned valve to cause the auxiliary valve to move with the firstmentioned valve only when opening the latter, and a thermostatic controller in the heat zone having connection with the auxiliary valve.

4e. The combination with the gas-burner and a valve therefor, of a cam secured to said valve, an auxiliary valve between said cam and the point of consumption of the gas, a lever piv- VIOO oted between its ends and having its ends held in operative relation to said cam and the auxiliary valve respectively, and a thermostatic controller in the heat zone having connection with said auxiliary valve.

5. The combination with a gas-burner and i a valve, of a valve-housing having a valve-A gas, an auxiliary valve in said valve-housing and having a groove therein, a lever connect- ,ing both valves 'to cause the auxiliary valve to be opened on opening the first-mentioned valve, said lever entering the groove in the auxiliary valve, and a thermostatic controller located in the heat zone and having connection with the auxiliary valve.

7. The combination with a gas-burner and a valve therefor, a valve-housing located between said valve and the. point of consumption of the gas and having a valve-seat and gas-passage therein, an auxiliary valve adapted to close said gas-passage and having a valvestem extending through the latter, operative connection between the auxiliary valve and the first-mentioned valve, and a thermostatic controller having connection with the stem of the auxiliary valve.

8. The combination with a gas-burner and a valve therefor, of a valve-housing between said valve and the point of consumption of the gas having oppositely-opening chambers separated by an intervening wall, said wall having a valve-seat and a gas-passage, an auxiliary valve adapted to open and close said gas-passage, suitable connection between both valves whereby the auxiliary valve is opened on opening the first-mentioned valve, and a thermostatic controller having connection with the auxiliary valve to open the latter still farther and to close the same when the light is extinguished.

9. The combination with a gas-burner, and a valve therefor, of a valve-housing between said valve and the point of consumption of the gas having oppositely-opening chambers separated by an intervening wall, said wall having a gas-passage therein, an auxiliary valve in one of said chambers to close said gas-passage and having a valve stem projecting through the gas -passage into the other of said chambers, said valve-stem being tapered atits outer end to check the dow of gas through said gas-passage when the auxiliary valve approaches the end of its opening movement, a suitable connection between both valves to cause the auxiliary valve to open on opening the lirst-mentioned valve, and a thermostat-ie controller arranged in the heat Zone and having an arm connected to the free end of the auxiliary-valve stem.

10. A thermostatie controller comprising two spiral coils arranged one within the other and Jformed of two strips of unequally-expansible metals.

11. A thermostatic controller comprising' two spiral coils arranged one within the other and formed of two strips of unequally-expansible metals, one of said strips being continued beyond the other, one end of said continued strip being secured to a fixed point and the other end thereof being free to move on change of temperature within certain limits.

12.- A thermostatic controller comprising two spiral coils arranged one within the other and formed of two strips of unequally-expansible metals, the outer strip having greater expanding capacity than the inner strip and being continued beyond the ends of the inner strip and extending outward to form arms, one of said arms being secured to a lixed point and the other arm being free to move on change of temperature within certain limits.

13. The combination with a gas-burner and a valve, oi' a cam secured to said valve rnd having a cut-away portion forming two shoulders, an auxiliary valve located between said cam and the point o1c consumption of the gas, a thermostatic controller in the heat zone and having connection with the auxiliary valve, and a lever pivoted between its ends and having one end operatively engaging the auxiliary valve and its other end lying between the shoulders en said cam.

14e. The combination with a gas-burner and a rotary valve, of a cam secured to the end ol said valve so as to revolve therewith, said cani having its edge cut away to forni two shoulders, an auxiliary valve located between said cam and the point of consumption of the gas, a thermostatic controller having connection with said auxiliary valve, and a lever piveted between its ends and having said ends oilset for engagement with the auxiliary valve and to lie between the shoulders ot' the cam, respectively.

15. The combination with a gas-lmrner and a valve, of a valve-housing between said valve and the point et' consumption of the gas, said housing having a gas-passage and a curved valve-seat coincident with said gas-passage, an auxiliary valve having` a rounded end iitting said curved valve-seat, a lever having loose connections with both valves to cause the auxiliary valve to open on opening the irst-mcntioned valve`, and a thermostatic controller in the heat Zone having connection with said auxiliary valve to close the same when the light becomes extinguished.

16. The combination with the gas-burner and a valve within a valve-casing, ol a cam secured to the upper end of said valve and havinga portion of its edge cut away to form two shoulders, a spring secured to the valve-casing and having its free end lying beneath said cut-away portion, an auxiliary valve, a thermostatic controller in the heat zone connected to said auxiliary valve, a link pivoted at one end to a fixed point, and a lever pivotal) y connected to the free end ol said link and having` its upper end loosely connected with the auxiliary valve and its lower end extending into the cut-away portion and bearing against the said spring, the latter serving to hold said lever elevated until actuated by the cam and until the auxiliary valve is moved Vfree of the upper end of said lever.

17. rl`he combination with the gas-burner and a valve, of an auxiliary valve between the lirst-mentioned valve and the peint of consumption of the gas, a pivoted lever having its upper end in engagement with said auxiliary IOO l'lO

- troller in the heat zone having connection with the auxiliary valve. l

18. The Combination' with thegas burner and a valve, of a valve-housing having a gas-4 passage,an auxiliary valve in said valve-housing having a groove therein and a pin arranged transversely insaid groove, said auxiliary valve being adapted to close saidgaspassage, a thermostatic controller in the heat zone having connection with said auxiliary valve, a link having one of its ends pivotally connected to the valve-housing, a lever pivoted between its ends to said link and having one end-engaging said pin, said end ofthe lever being inclined, means for actuating the opposite end of the lever, and means for nor- Y* mally holding said lever elevated for engagement with said pin.

19. The combination with the gas-burner and a gas-Cook comprising a easing having its outlet end open and a valve in said casing, of

"a valve-housing secured to the open end of said casing and having a gas-passage therein, an auxiliary valve adapted to close said pas sage, a thermostatie controller in the heat zone having connection with said auxiliary valve, and operative connection between both valves whereby said auxiliary valve is opened on opening the first mentioned valve and whereby the auxiliary valve is allowed to close without closing the first-mentioned valve.

In testimony whereof I have aliixed my signature in the 'presence of two subscribing witnesses.

. GEORGE C. J ETT. Witnesses:

- EMIL NEUHART,

CHAs. F. BURKHART. 

